1. The Change, Destruction, Death and Rebirth of the Crust
Plate Boundaries
The Change, Destruction, Death and Rebirth of the Crust

2. A. Divergent Boundaries
= Constructive plate boundaries
Two plates moving away from each other
The Oceanic Ridge
A very long crack in the crust which lets out lava
Driving Force of Plate movement
Creates new oceanic crust
As more crust is created
“Pushes” 2 plates away from each other

3. The Oceanic Ridge

4. B. Convergent Boundaries
= Destructive plate boundaries
Two plates crushing against each other
Earthquakes
Volcanoes
Mountains
Three Types
Oceanic-Continental
Oceanic-Oceanic
Continental-Continental

5. B. Convergent Boundaries
Oceanic-Continental
Oceanic Crust = More dense
Continental Crust = Less dense
When they collide
More dense Oceanic Crust subducts under less dense Continental Crust
Friction causes Heat
Depth causes pressure
Creates Volcanic Mountain Ranges
Continental volcanic arc

7. B. Convergent Boundaries
Oceanic-Oceanic
One Oceanic crust descends under the other
Creates Volcanic Island Arc
Aleutian Islands – Alaska
Japan
Philippines

8. B. Convergent Boundaries
Continental-Continental
Starts off as Oceanic-Continental
Creates Continental Volcanic Arc
Oceanic Plate happens to carry Continental Crust
Continental Crust collides with Continental Crust
This Forces existing Volcanic Arc even more upward
India collides into China 10 million years ago

9. C. Transform Fault Boundaries
Plates grind against each other
Without destroying the crust
San Andreas Fault
California